[Netherlands. The processing of zootechnic liquid manures in big plants]

acqua agua allevamento zootecnico intensivo azote azoto barn cleaners calves centrifugation centrifugazione centrifuging cerdo costi costos costs crianza intensiva drying eau essiccazione intensive husbandry inversiones investimento investissement investment liquami liquid manures nitrogen porcin production produzione purin secado swine ternero veau vitelli water